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Trend Micro Discovered Virus: Troj_agent.ahqy

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#1 BN_Iowa


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Posted 23 September 2008 - 07:50 PM

I desperately need your expert help.

Yesterday a friendís computer was infected with Antivirus 2009.
Computer running Windows XP Pro Svc Pack 2 IE ver 6

Ran Malwarebytes Anti-malware 1.28 database version 1193 windows 5.1.2600 svc pack 2

Ran it, and it showed several infections and let it clean them.
Ran it a second time, and showed everything clear. The computer ran fine the rest of the day. I was bad, and did not create a restore point. (I learned my lesson.)

Today, when he started his computer, it showed that he had infected file: c:\windows\system32\fsusd32.dll with virus TROJ_AGENT.AHQY (Virus successfully detected, cannot perform the Quarantine action)

It appeared to be in an unending loop repeating this same message within seconds.

I ran MBAM again Ė it showed no infections

Then ran SUPERAntiSpyware.exe in Safe Mode. After 2 hours, it showed 5 detected files Ė all 5 were cookies: xxxx @207[1].txt xxxx @doubleclick[1].txt xxxx@atdmt[1].txt xxx@statse.webtrendslive[2].txt xxxx@tribalfusion[2].txt

It still has the TROJ_AGENT.AHQY - c:\windows\system32\fsusd32.dll virus

Please advise what step to take next.

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#2 Budapest


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Posted 23 September 2008 - 08:02 PM

Try this scan:

Before we start fixing anything you should print out these instructions or copy them to a NotePad file so they will be accessible. Some steps will require you to disconnect from the Internet or use Safe Mode and you will not have access to this page.

Please download DrWeb-CureIt and save it to your desktop. DO NOT perform a scan yet.

Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".

Scan with Dr.Web CureIt as follows:
  • Double-click on launch.exe to start the program.
  • Cancel any prompts to download the latest CureIt version and click Start.
  • At the prompt to "Start scan now", click Ok. Allow the setup.exe/driver to load if asked by any of your security programs.
  • The Express scan will automatically begin.
    (This is a short scan of files currently running in memory, boot sectors, and targeted folders).
  • If an infected object is found, you will be prompted to move anything that cannot be cured. Click Yes to All.
  • When complete, click Select All, then choose Cure > Move incurable.
    (This will move any detected files to the C:\Documents and Settings\userprofile\DoctorWeb\Quarantine folder if they can't be cured)
  • Now put a check next to Complete scan to scan all local disks and removable media.
  • In the top menu, click Settings > Change settings, and UNcheck "Heuristic analysis" under the "Scanning" tab, then click Ok.
  • Back at the main window, click the green arrow "Start Scanning" button on the right under the Dr.Web logo.
  • When the scan is complete, a message will be displayed at the bottom indicating if any viruses were found.
  • Click "Yes to all" if asked to cure or move the file(s) and select "Move incurable".
  • In the top menu, click file and choose save report list.
  • Save the DrWeb.csv report to your desktop.
  • Exit Dr.Web Cureit when done.
  • Important! Reboot your computer because it could be possible that files in use will be moved/deleted during reboot.
  • After reboot, post the contents of the log from Dr.Web in your next reply. (You can use Notepad to open the DrWeb.cvs report)

The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#3 BN_Iowa

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Posted 23 September 2008 - 08:08 PM

I'll go do this now. I will post the results.


#4 BN_Iowa

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Posted 24 September 2008 - 12:09 AM


Dr.Web CureIt has been ran, and the Express Scan found the following (DrWeb.csv report):

fsusd32.dll;c:\windows\system32;Probably DLOADER.Trojan;Incurable.Moved.

The complete scan took 2 hrs 40 min, but did not find anything more.

On the reboot, it popped up 1 screen with the message that it had the infected file c:\windows\system32\fsusd32.dll with virus Troj_Agent.AHQY (But only 1)

I did a shutdown, waited a while and turned it back on. This time it appeared to be a clean boot. I created a restore point once it was back up. I did another shutdown, had it sit 15 min then turned back on, and it seems to be another clean boot.

Thank you for your help, and please let me know if you think I should do anything else.


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